evp_asn1.c

/* crypto/asn1/evp_asn1.c *//* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */#include <stdio.h>#include "cryptlib.h"#include <openssl/asn1.h>#include <openssl/asn1_mac.h>int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsignedchar *data, int len)
{
ASN1_STRING *os;
if ((os=M_ASN1_OCTET_STRING_new()) == NULL) return(0);
if (!M_ASN1_OCTET_STRING_set(os,data,len)) return(0);
ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os);
return(1);
}
/* int max_len: for returned value */int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsignedchar *data,
int max_len)
{
int ret,num;
unsignedchar *p;
if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL))
{
ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG);
return(-1);
}
p=M_ASN1_STRING_data(a->value.octet_string);
ret=M_ASN1_STRING_length(a->value.octet_string);
if (ret < max_len)
num=ret;
else
num=max_len;
memcpy(data,p,num);
return(ret);
}
int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsignedchar *data,
int len)
{
int n,size;
ASN1_OCTET_STRING os,*osp;
ASN1_INTEGER in;
unsignedchar *p;
unsignedchar buf[32]; /* when they have 256bit longs, * I'll be in trouble */
in.data=buf;
in.length=32;
os.data=data;
os.type=V_ASN1_OCTET_STRING;
os.length=len;
ASN1_INTEGER_set(&in,num);
n = i2d_ASN1_INTEGER(&in,NULL);
n+=M_i2d_ASN1_OCTET_STRING(&os,NULL);
size=ASN1_object_size(1,n,V_ASN1_SEQUENCE);
if ((osp=ASN1_STRING_new()) == NULL) return(0);
/* Grow the 'string' */if (!ASN1_STRING_set(osp,NULL,size))
{
ASN1_STRING_free(osp);
return(0);
}
M_ASN1_STRING_length_set(osp, size);
p=M_ASN1_STRING_data(osp);
ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
i2d_ASN1_INTEGER(&in,&p);
M_i2d_ASN1_OCTET_STRING(&os,&p);
ASN1_TYPE_set(a,V_ASN1_SEQUENCE,osp);
return(1);
}
/* we return the actual length..., num may be missing, in which * case, set it to zero *//* int max_len: for returned value */int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsignedchar *data,
int max_len)
{
int ret= -1,n;
ASN1_INTEGER *ai=NULL;
ASN1_OCTET_STRING *os=NULL;
constunsignedchar *p;
long length;
ASN1_const_CTX c;
if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL))
{
goto err;
}
p=M_ASN1_STRING_data(a->value.sequence);
length=M_ASN1_STRING_length(a->value.sequence);
c.pp= &p;
c.p=p;
c.max=p+length;
c.error=ASN1_R_DATA_IS_WRONG;
M_ASN1_D2I_start_sequence();
c.q=c.p;
if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err;
c.slen-=(c.p-c.q);
c.q=c.p;
if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err;
c.slen-=(c.p-c.q);
if (!M_ASN1_D2I_end_sequence()) goto err;
if (num != NULL)
*num=ASN1_INTEGER_get(ai);
ret=M_ASN1_STRING_length(os);
if (max_len > ret)
n=ret;
else
n=max_len;
if (data != NULL)
memcpy(data,M_ASN1_STRING_data(os),n);
if (0)
{
err:
ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG);
}
if (os != NULL) M_ASN1_OCTET_STRING_free(os);
if (ai != NULL) M_ASN1_INTEGER_free(ai);
return(ret);
}